$ git clone -n https://gitee.com/happy_orange/grub2.git /var/lib/mock/dist-an23-build-332043-69562/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-332043-69562/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 9d0b0674f17e88523581e556af30e8f3d477326d:KOJI_FETCH_HEAD
From https://gitee.com/happy_orange/grub2
 * [new ref]         9d0b0674f17e88523581e556af30e8f3d477326d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d0b067 rebuild for x86